Merge pull request #343 from eugenp/pr/318

Spring Data Redis article examples

spring-data-redis/README.md

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+## Spring Data Redis
+
+### Relevant Articles:
+- [Introduction to Spring Data Redis]
+
+### Build the Project with Tests Running
+```
+mvn clean install
+```
+
+### Run Tests Directly
+```
+mvn test
+```
+

spring-data-redis/pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.baeldung</groupId>
+  <artifactId>sprint-data-redis</artifactId>
+  <version>0.0.1-SNAPSHOT</version>
+  <packaging>jar</packaging>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <spring.version>4.2.2.RELEASE</spring.version>
+    <spring-data-redis>1.6.2.RELEASE</spring-data-redis>
+    <nosqlunit.version>0.8.0</nosqlunit.version>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.springframework.data</groupId>
+      <artifactId>spring-data-redis</artifactId>
+      <version>${spring-data-redis}</version>
+    </dependency>
+
+    <dependency>
+      <groupId>cglib</groupId>
+      <artifactId>cglib-nodep</artifactId>
+      <version>2.2</version>
+    </dependency>
+
+    <dependency>
+      <groupId>log4j</groupId>
+      <artifactId>log4j</artifactId>
+      <version>1.2.16</version>
+    </dependency>
+
+    <dependency>
+      <groupId>redis.clients</groupId>
+      <artifactId>jedis</artifactId>
+      <version>2.5.1</version>
+      <type>jar</type>
+    </dependency>
+
+    <dependency>
+      <groupId>org.springframework</groupId>
+      <artifactId>spring-core</artifactId>
+      <version>${spring.version}</version>
+    </dependency>
+
+    <dependency>
+      <groupId>org.springframework</groupId>
+      <artifactId>spring-context</artifactId>
+      <version>${spring.version}</version>
+    </dependency>
+
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.12</version>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>org.springframework</groupId>
+      <artifactId>spring-test</artifactId>
+      <version>${spring.version}</version>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>com.lordofthejars</groupId>
+      <artifactId>nosqlunit-redis</artifactId>
+      <version>${nosqlunit.version}</version>
+    </dependency>
+
+  </dependencies>
+</project>

spring-data-redis/src/main/java/org/baeldung/spring/data/redis/config/RedisConfig.java

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+package org.baeldung.spring.data.redis.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
+import org.springframework.data.redis.core.RedisTemplate;
+
+@Configuration
+@ComponentScan("org.baeldung.spring.data.redis")
+public class RedisConfig {
+
+    @Bean
+    JedisConnectionFactory jedisConnectionFactory() {
+        return new JedisConnectionFactory();
+    }
+
+    @Bean
+    public RedisTemplate<String, Object> redisTemplate() {
+        final RedisTemplate< String, Object> template =  new RedisTemplate<String, Object>();
+        template.setConnectionFactory(jedisConnectionFactory());
+        return template;
+    }
+}

spring-data-redis/src/main/java/org/baeldung/spring/data/redis/model/Student.java

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+package org.baeldung.spring.data.redis.model;
+
+import java.io.Serializable;
+
+public class Student implements Serializable {
+
+    public enum Gender {
+        MALE, FEMALE
+    }
+
+    private String id;
+    private String name;
+    private Gender gender;
+    private int grade;
+
+    public Student(String id, String name, Gender gender, int grade) {
+        this.id = id;
+        this.name = name;
+        this.gender = gender;
+        this.grade = grade;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Gender getGender() {
+        return gender;
+    }
+
+    public void setGender(Gender gender) {
+        this.gender = gender;
+    }
+
+    public int getGrade() {
+        return grade;
+    }
+
+    public void setGrade(int grade) {
+        this.grade = grade;
+    }
+
+    @Override
+    public String toString() {
+        return "Student{" + "id='" + id + '\'' + ", name='" + name + '\'' + ", gender=" + gender + ", grade=" + grade + '}';
+    }
+}

spring-data-redis/src/main/java/org/baeldung/spring/data/redis/repo/StudentRepository.java

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+package org.baeldung.spring.data.redis.repo;
+
+import org.baeldung.spring.data.redis.model.Student;
+import org.springframework.stereotype.Component;
+
+import java.util.Map;
+
+public interface StudentRepository {
+    
+    void saveStudent(Student person);
+    
+    void updateStudent(Student student);
+
+    Student findStudent(String id);
+
+    Map<Object, Object> findAllStudents();
+
+    void deleteStudent(String id);
+}

spring-data-redis/src/main/java/org/baeldung/spring/data/redis/repo/StudentRepositoryImpl.java

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+package org.baeldung.spring.data.redis.repo;
+
+import org.baeldung.spring.data.redis.model.Student;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.stereotype.Repository;
+
+import java.util.Map;
+
+@Repository
+public class StudentRepositoryImpl implements StudentRepository {
+
+    private static final String KEY = "Student";
+
+    @Autowired
+    private RedisTemplate<String, Object> redisTemplate;
+
+    public void saveStudent(final Student student) {
+        redisTemplate.opsForHash().put(KEY, student.getId(), student);
+    }
+
+    public void updateStudent(final Student student) {
+        redisTemplate.opsForHash().put(KEY, student.getId(), student);
+    }
+
+    public Student findStudent(final String id) {
+        return (Student) redisTemplate.opsForHash().get(KEY, id);
+    }
+
+    public Map<Object, Object> findAllStudents() {
+        return redisTemplate.opsForHash().entries(KEY);
+    }
+
+    public void deleteStudent(final String id) {
+        this.redisTemplate.opsForHash().delete(KEY, id);
+    }
+}

spring-data-redis/src/main/resources/logback.xml

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+<configuration>
+
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.springframework" level="WARN" />
+    <logger name="org.springframework.transaction" level="WARN" />
+
+    <!-- in order to debug some marshalling issues, this needs to be TRACE -->
+    <logger name="org.springframework.web.servlet.mvc" level="WARN" />
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+
+</configuration>

spring-data-redis/src/test/java/org/baeldung/spring/data/redis/repo/StudentRepositoryTest.java

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+package org.baeldung.spring.data.redis.repo;
+
+import org.baeldung.spring.data.redis.config.RedisConfig;
+import org.baeldung.spring.data.redis.model.Student;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import java.util.Map;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = RedisConfig.class)
+public class StudentRepositoryTest {
+
+    @Autowired
+    private StudentRepository studentRepository;
+
+    @Test
+    public void whenSavingStudent_thenAvailableOnRetrieval() throws Exception {
+        final Student student = new Student("Eng2015001", "John Doe", Student.Gender.MALE, 1);
+        studentRepository.saveStudent(student);
+        final Student retrievedStudent = studentRepository.findStudent(student.getId());
+        assertEquals(student.getId(), retrievedStudent.getId());
+    }
+
+    @Test
+    public void whenUpdatingStudent_thenAvailableOnRetrieval() throws Exception {
+        final Student student = new Student("Eng2015001", "John Doe", Student.Gender.MALE, 1);
+        studentRepository.saveStudent(student);
+        student.setName("Richard Watson");
+        studentRepository.saveStudent(student);
+        final Student retrievedStudent = studentRepository.findStudent(student.getId());
+        assertEquals(student.getName(), retrievedStudent.getName());
+    }
+
+    @Test
+    public void whenSavingStudents_thenAllShouldAvailableOnRetrieval() throws Exception {
+        final Student engStudent = new Student("Eng2015001", "John Doe", Student.Gender.MALE, 1);
+        final Student medStudent = new Student("Med2015001", "Gareth Houston", Student.Gender.MALE, 2);
+        studentRepository.saveStudent(engStudent);
+        studentRepository.saveStudent(medStudent);
+        final Map<Object, Object> retrievedStudent = studentRepository.findAllStudents();
+        assertEquals(retrievedStudent.size(), 2);
+    }
+
+    @Test
+    public void whenDeletingStudent_thenNotAvailableOnRetrieval() throws Exception {
+        final Student student = new Student("Eng2015001", "John Doe", Student.Gender.MALE, 1);
+        studentRepository.saveStudent(student);
+        studentRepository.deleteStudent(student.getId());
+        final Student retrievedStudent = studentRepository.findStudent(student.getId());
+        assertNull(retrievedStudent);
+    }
+}